Hydro boost question
Thread Starter
Melting Slicks
Joined: May 2002
Posts: 2,717
Likes: 121
From: Sulphur LA
St. Jude Donor '05-'06,'11,'13-'14,'16,'18,'19,'24, '25
Hydro boost question
What size and type fitting do I need for the pressure line on the power assist valve? I need to order the fittings to plumb my HB. I have the size for the adapters on the HB, but am unable to locate the size and type on the power assist valve. I will be going with 6AN fittings.
Instructor
Joined: Mar 2001
Posts: 117
Likes: 8
From: SWFL
If I remember right, both are inverted flare..pressure side is 7/16-24 thread and return is 5/8-18. Aeroquip makes a 90 degree hose end with the 5/8 IF fitting, I had to use a AN -4 to 7/16 IF adapter out of the valve and then I stepped the -4 up to a -6 on the flex line that moves with the valve.
I switched to the Saginaw 12.7:1 box a year ago, but I still have the old valve and hoses that I can check tonight to verify if you need.
Phil
I switched to the Saginaw 12.7:1 box a year ago, but I still have the old valve and hoses that I can check tonight to verify if you need.
Phil
